Improvement in lock-cases



C. H. LAMBK-IN.

Locri-CASES. No. 190,341. Patented May-1,1877.

UNITED STATES PATENT OEEIoE.

CHARLES H. LAMBKIN, OF MOUNT VERNON, NEW YORK.

IMPROVEMENT IN LOCK-CASES.

Specification forming part of Letters Patent No. 90,341, dated May 1, 1877; application filed April 12, 1877,

To all whom it may concern:

Be it known that I, CHARLES H. LAMBKIN, of Mount Vernon, county of Westchester, and

State of New York, have invented a new and useful Improvement in Lock-Gases, which improvement is fully set forth in the following specification, reference being had to the accompanying drawing, in which- Figure 1 represents portions of two windowsashes in vertical section containing my improvement. Fig. 2 is a horizontal section thereof'. Fig. 3 is a side view of the case detached.

Similar letters indicate corresponding parts. My improvement has reference to the construction of lock-cases, and is especially adapted to the cases of that class of locks which are used for fastening window-sashes..

The invention consists in a lock-case constructed at its front edge with external tapering projections, in combination with the faccplate having the claws adapted to slide over the projections on the look-case, said face-plate being rigidly fixed in an oblique plane to the body of the lock-case, as will more fully hereinafter appear.

In the drawing, the letter A designates the body of my lock-case, and B is the faceplate zontal plane, the faceplate B is brought flush with the inner side of said rail, which, as is well known, is usually inclined or made tapering at that point, as shown in Fig. l; and it is obvious that by being enabled to mortise the lock-case in the meeting-rail of a windowsash,the case is hidden from view, and hence it can be finished very cheaply, both as to quality and cost.

On one of the surfaces of the face-plate B are cast or otherwise formed two claws, O C, and on two opposite edges of the body A ot' the lock-case are cast or otherwise formed tapering projections D D. (Best seen in Fig. 3.) Now the claws G C are placed at such a distance apart that they can be slid under the tapering projections D D, and by this means the face-plate B is rmly attached to the body A, while, if desired, said face-plate can be detached. The bolt of the lock, which is placed in the case A, also assists in holding the faceplate B in position when such bolt is passed through the opening made in the face-plate for this purpose.

It is obvious that the claws C C and tapering projections D D are applicable to a lock-case other than to one having an oblique face-plate.

In the example shown I have made use of a lock in connection with my case, composed of a bolt, E, which is subjected to the action of a spring, G, and which is actuated by a lever, Il, so arranged that it can be oscillated by a push-pin or key, I, inserted in a hole in the case, the bolt E being made to catch in a mortise formed in the meeting-rail opposite to the one containing the lock, when my invention is applied to Window-sashes.

What I claim as new, and desire-to secure by Letters Patent, is-

rlhe body A of a lock-case, constructed with externally-tapering projections D D, in combination with the face-plate B, having the claws C C, adapted to slide over the said projections, said faceplate being rigidly Xcd in an oblique plane to the body of the lock-case, as and for the purpose described.

In testimony that I claim the foregoing I have hereunto set my hand and seal this 5th day of April, 1877.

CHARLES H. LAMBKIN. [1.. s]

Witnesses E. F. KASTENHUEEE, CHAs. WAELEBs. 

